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Finding the Fourth Proportional to 383,419.60, 575,129.40 and 102,965.20

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Solution

The fourth proportional to 383,419.60, 575,129.40 and 102,965.20 is: 154,447.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,419.60 : 575,129.40 = 102,965.20 : x
  2. Step 2: Convert to fraction form
    383,419.60/575,129.40 = 102,965.20/x
  3. Step 3: Cross multiply
    383,419.60x = 575,129.40 × 102,965.20
  4. Step 4: Simplify right side
    383,419.60x = 59,218,313,696.88
  5. Step 5: Solve for x
    x = 59,218,313,696.88/383,419.60
  6. Step 6: Final answer
    x = 154,447.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.